Iran is bordered on the east by Pakistan and Afghanistan, where U.S. troops have been waging a costly war, in terms of money and lives, against Taliban, Al-Qaeda and other terrorists.

The Persian Gulf is on Iran’s southern border, and last week’s report, confirmed by the Pentagon, that 11 warships had sailed through the Suez Canal, raised alarm bells that the U.S. is ready to fight to keep the Persian Gulf open.

Kuwait, which is heavily armed by the U.S. and is home to American bases, is located on the southwestern border of Iran. The country’s western neighbors are Turkey and Iraq, also home to American bases, and Turkmenistan, the Caspian Sea and Azerbaijan are the Islamic Republic’s northern neighbors.

The U.S.army last year advanced military cooperation with Turkmenistan. An independent Caspian news agency has confirmed unusually heavy activity of American troops along the border with Iran. The Iranian Revolutionary Guards’ Brigadier General Mehdi Moini said last week that his forces increased patrols, including tanks and anti-aircraft units, along the border with Azerbaijan because they noticed increased American activity. Iran charged that Israeli forces were also present, sparking a virtual war alert among the Iranian Guards.

In addition, the Times of London reported earlier this month that Saudi Arabia has agreed to open its air space for Israel Air Force jets, a claim that the Saudi monarchy denied. It similar denied Iranian news agency claims that Israeli helicopters unloaded military equipment at a northwestern Saudi Arabian air base, from where Israeli planes theoretically could reach Iran in the shorts possible time.

Several defense websites have reported that Israel is deploying one to three German-made nuclear submarines in the Persian Gulf as a defensive measure against the possibility of a missile attacks from Lebanon and Syria, as well as Iran.

Two Israeli air force squadrons are training to blow up an Iranian facility using low-yield nuclear “bunker-busters”, according to several Israeli military sources. As a nuclear veteran (Operation Redwing, Bikini, 1956) I can affirm that this is absolute madness. The “bunker buster” is a cute sounding name for a nuclear horror. Air bursts are horrible enough, doing incredible destruction through heat, shock and high initial radiation. The fallout from an air burst is registered around the world. A surface or subsurface burst is even deadlier and more long lasting.

The supposed leak comes simultaneous with news that the US military is speeding up delivery of a colossal “bunker-buster” bomb dubbed the Massive Ordnance Penetrator (MOP)—to be the largest non-nuclear bomb in the Pentagon arsenal, carrying 5,300 pounds of explosives. The Pentagon has awarded a $52 million contract to speed placement of the MOP aboard the B-2 Stealth bomber.

Under the plans, conventional laser-guided bombs would open “tunnels” into the targets. “Mini-nukes” would then immediately be fired into a plant at Natanz, exploding deep underground to reduce the risk of radioactive fallout.

“As soon as the green light is given, it will be one mission, one strike and the Iranian nuclear project will be demolished,” said one of the sources.

The plans, disclosed to The Sunday Times last week, have been prompted in part by the Israeli intelligence service Mossad’s assessment that Iran is on the verge of producing enough enriched uranium to make nuclear weapons within two years.

Israeli military commanders believe conventional strikes may no longer be enough to annihilate increasingly well-defended enrichment facilities. Several have been built beneath at least 70ft of concrete and rock. However, the nuclear-tipped bunker-busters would be used only if a conventional attack was ruled out and if the United States declined to intervene, senior sources said.

Israel has identified three prime targets south of Tehran which are believed to be involved in Iran’s nuclear programme:

Natanz, where thousands of centrifuges are being installed for uranium enrichment

A uranium conversion facility near Isfahan where, according to a statement by an Iranian vice-president last week, 250 tons of gas for the enrichment process have been stored in tunnels

A heavy water reactor at Arak, which may in future produce enough plutonium for a bomb Israeli officials believe that destroying all three sites would delay Iran’s nuclear programme indefinitely and prevent them from having to live in fear of a “second Holocaust”.

The Israeli government has warned repeatedly that it will never allow nuclear weapons to be made in Iran, whose president, Mahmoud Ahmadinejad, has declared that “Israel must be wiped off the map”.

Air force squadrons based at Hatzerim in the Negev desert and Tel Nof, south of Tel Aviv, have trained to use Israel’s tactical nuclear weapons on the mission. The preparations have been overseen by Major General Eliezer Shkedi, commander of the Israeli air force.

Israel is planning military attacks on Iran after December, the French magazine Le Canard Enchainé asserted Oct. 13. According to the report, quoted by Israel Radio, Jerusalem has already ordered from a French food manufacturer combat rations for soldiers serving in elite units, and asked reservists of these units staying abroad to return to Israel. The report also states that in a recent visit to France, IDF Chief of General Staff Gabi Ashkenazi told his French counterpart Jean-Louis Georgelin that

Sources close to the Pentagon said the United States was highly unlikely to give approval for tactical nuclear weapons to be used. One source said Israel would have to seek approval “after the event”, as it did when it crippled Iraq’s nuclear reactor at Osirak with airstrikes in 1981. Scientists have calculated that although contamination from the bunker-busters could be limited, tons of radioactive uranium compounds would be released. The Israelis believe that Iran’s retaliation would be constrained by fear of a second strike if it were to launch its Shehab-3 ballistic missiles at Israel. However, American experts warned of repercussions, including widespread protests that could destabilise parts of the Islamic world friendly to the West. Colonel Sam Gardiner, a Pentagon adviser, said Iran could try to close the Strait of Hormuz, the route for 20% of the world’s oil.

Some of the material collected and transmitted by the accused spies dealt with U.S. research on nuclear “bunker buster” bombs, according to the federal document charging the ring’s members. They also sought information on Pentagon planning, U.S. policy toward Central Asia and research on terrorists gaining access to the Internet.